Sidee loo tijaabiyaa viscosity hydroxypropyl methylcellulose?

Hydroxypropyl methylcellulose ee dhismaha wuxuu u baahan yahay inuu ka fogaado gelitaanka biyaha ee gidaarka, iyo haynta qaddarka ku habboon ee biyaha ee hoobiye waxay ka dhigi kartaa sibidhka si buuxda u soo saaro waxqabad wanaagsan oo biyaha iyo biyaha ah. Hydroxypropyl methylcellulose viscosity of cellulose ee hoobiye ayaa si toos ah u dhiganta, mar kasta oo viscosity sare, si fiican u haynta biyaha ee hydroxypropyl methylcellulose.

Marka qoyaanka hydroxypropyl methylcellulose uu aad u sarreeyo, haynta biyaha ee hydroxypropyl methylcellulose ayaa yaraan doonta, taas oo si toos ah u horseedi doonta hoos u dhaca waxtarka dhismaha ee hydroxypropyl methylcellulose. Waxaan kaloo la soconaa waxyaabaha u sahlan in la qaladaado. Had iyo jeer waa inaan sii wadnaa mid cusub, waxaana heli doonaa natiijooyin lama filaan ah.

Viscosity muuqda waa tilmaame muhiim u ah hydroxypropyl methylcellulose. Hababka go'aaminta caadiga ah waa viscometry rotational, viskometry capillary iyo muuqalka dayrta oo dhacaya.

Waagii hore, habka go'aaminta hydroxypropyl methylcellulose wuxuu ahaa viskometry capillary, iyadoo la adeegsanayo viskometer ubbelohde. Caadi ahaan xalinta go'aaminta waa xal biyo ah oo 2 ah, qaacidaduna waa: V=Kdt. V waxay u taagan tahay viscosity, unuggu waa, K waa joogtaynta viscometerka, d waxay ka dhigan tahay cufnaanta heerkulka joogtada ah, t waxa loola jeedaa wakhtiga kor ilaa hoos iyada oo loo marayo viscometerka, cutubku waa s labaad. Habkani waa mid dhib badan in lagu shaqeeyo, haddii ay jiraan walxo aan milmi karin, way fududahay in la sameeyo khaladaad, wayna adagtahay in la ogaado tayada hydroxypropyl methylcellulose.

Dhibaatada delamination ee xabagta dhismaha waa dhibaato weyn oo ay la kulmaan macaamiisha. Ugu horreyntii, dhibaatada alaabta ceeriin waa in lagu tixgeliyaa delamination ee xabagta dhismaha. Sababta ugu weyn ee delamination ee xabagta dhismaha waa polyvinyl khamriga (PVA) iyo hydroxypropyl methylcellulose (HPMC). oo ay keento isqabqabsi la'aan. Marka labaad, waa sababta oo ah wakhtiga kicinta kuma filna; waxaa sidoo kale jira xaqiiqda ah in waxqabadka dhumucdiisuna ay tahay xabagta dhismuhu ma fiicna.

Xabagta dhismaha, degdegga ah hydroxypropyl methylcellulose (HPMC) waa in la isticmaalaa, sababtoo ah hydroxypropyl methylcellulose (HPMC) kaliya ayaa lagu kala firdhiyaa biyaha iyada oo aan la milmin dhab ah. Qiyaastii 2 daqiiqo, viscosity ee dareeraha ayaa si tartiib tartiib ah u kordhaya, samaynta kolloid viscos ah oo hufan.

Alaabta kulul ee dhalaalaysa, marka ay la kulmaan biyo qabow, waxay si degdeg ah ugu firdhi karaan biyaha kulul waxayna ku baaba'aan biyaha kulul. Marka heerkulku hoos ugu dhaco heerkul gaar ah, mawgu si tartiib ah ayuu u soo baxayaa ilaa uu ka sameeyo kolloid viscos ah oo hufan. Qadarka lagu taliyey ee hydroxypropyl methylcellulose (HPMC) ee lagu daray xabagta dhismaha waa 2-4kg.

Hydroxypropyl methylcellulose (HPMC) waxay leedahay sifooyin kiimikaad oo deggan, caariyaysi caariyaysi ah, iyo biyo ku hayn wanaagsan oo ku jira xabagta dhismaha, mana saameeyaan isbeddellada qiimaha pH. Waxaa loo isticmaali karaa viscosity u dhexeeya 100,000 S ilaa 200,000 S. Laakiin wax soo saarka, heerka sare ee viscosity, ka wanaagsan. Viscosity-ku waxa uu u dhigma si ka duwan xoogga curaarta. Markasta oo viscosity-ku sarreeyo, xoogga yar ayaa sii yaraanaya. Guud ahaan, viscosity of 100,000 S waa ku haboon.